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Fix is.nonEmptyArray() type narrowing with undefined (#188)

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Eugene 2023-07-17 10:42:04 +01:00 • committed by GitHub
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commit 20ad8231c2
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2 changed files with 5 additions and 5 deletions
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6
source/index.ts
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@ -388,7 +388,7 @@ is.oddInteger = isAbsoluteMod2(1);
is.emptyArray = (value: unknown): value is never[] => is.array(value) && value.length === 0; is.emptyArray = (value: unknown): value is never[] => is.array(value) && value.length === 0;
is.nonEmptyArray = <T = unknown, Item = unknown>(value: T | Item[]): value is (T extends Item[] ? [Item, ...Item[]] : T) => is.array(value) && value.length > 0; is.nonEmptyArray = <T = unknown, Item = unknown>(value: T | Item[]): value is [Item, ...Item[]] => is.array(value) && value.length > 0;
is.emptyString = (value: unknown): value is '' => is.string(value) && value.length === 0; is.emptyString = (value: unknown): value is '' => is.string(value) && value.length === 0;
@ -584,7 +584,7 @@ type Assert = {
nodeStream: (value: unknown) => asserts value is NodeStream; nodeStream: (value: unknown) => asserts value is NodeStream;
infinite: (value: unknown) => asserts value is number; infinite: (value: unknown) => asserts value is number;
emptyArray: (value: unknown) => asserts value is never[]; emptyArray: (value: unknown) => asserts value is never[];
nonEmptyArray: <T = unknown, Item = unknown>(value: T | Item[]) => asserts value is (T extends Item[] ? [Item, ...Item[]] : T); nonEmptyArray: <T = unknown, Item = unknown>(value: T | Item[]) => asserts value is [Item, ...Item[]];
emptyString: (value: unknown) => asserts value is ''; emptyString: (value: unknown) => asserts value is '';
emptyStringOrWhitespace: (value: unknown) => asserts value is string; emptyStringOrWhitespace: (value: unknown) => asserts value is string;
nonEmptyString: (value: unknown) => asserts value is string; nonEmptyString: (value: unknown) => asserts value is string;
@ -692,7 +692,7 @@ export const assert: Assert = {
nodeStream: (value: unknown): asserts value is NodeStream => assertType(is.nodeStream(value), AssertionTypeDescription.nodeStream, value), nodeStream: (value: unknown): asserts value is NodeStream => assertType(is.nodeStream(value), AssertionTypeDescription.nodeStream, value),
infinite: (value: unknown): asserts value is number => assertType(is.infinite(value), AssertionTypeDescription.infinite, value), infinite: (value: unknown): asserts value is number => assertType(is.infinite(value), AssertionTypeDescription.infinite, value),
emptyArray: (value: unknown): asserts value is never[] => assertType(is.emptyArray(value), AssertionTypeDescription.emptyArray, value), emptyArray: (value: unknown): asserts value is never[] => assertType(is.emptyArray(value), AssertionTypeDescription.emptyArray, value),
nonEmptyArray: <T = unknown, Item = unknown>(value: T | Item[]): asserts value is (T extends Item[] ? [Item, ...Item[]] : T) => assertType(is.nonEmptyArray(value), AssertionTypeDescription.nonEmptyArray, value), nonEmptyArray: <T = unknown, Item = unknown>(value: T | Item[]): asserts value is [Item, ...Item[]] => assertType(is.nonEmptyArray(value), AssertionTypeDescription.nonEmptyArray, value),
emptyString: (value: unknown): asserts value is '' => assertType(is.emptyString(value), AssertionTypeDescription.emptyString, value), emptyString: (value: unknown): asserts value is '' => assertType(is.emptyString(value), AssertionTypeDescription.emptyString, value),
emptyStringOrWhitespace: (value: unknown): asserts value is string => assertType(is.emptyStringOrWhitespace(value), AssertionTypeDescription.emptyStringOrWhitespace, value), emptyStringOrWhitespace: (value: unknown): asserts value is string => assertType(is.emptyStringOrWhitespace(value), AssertionTypeDescription.emptyStringOrWhitespace, value),
nonEmptyString: (value: unknown): asserts value is string => assertType(is.nonEmptyString(value), AssertionTypeDescription.nonEmptyString, value), nonEmptyString: (value: unknown): asserts value is string => assertType(is.nonEmptyString(value), AssertionTypeDescription.nonEmptyString, value),

4
test/test.ts
View file

@ -1626,7 +1626,7 @@ test('is.nonEmptyArray', t => {
}); });
{ {
const strings = ['🦄', 'unicorn']; const strings = ['🦄', 'unicorn'] as string[] | undefined;
const function_ = (value: string) => value; const function_ = (value: string) => value;
if (is.nonEmptyArray(strings)) { if (is.nonEmptyArray(strings)) {
@ -1656,7 +1656,7 @@ test('is.nonEmptyArray', t => {
} }
{ {
const strings = ['🦄', 'unicorn']; const strings = ['🦄', 'unicorn'] as string[] | undefined;
const function_ = (value: string) => value; const function_ = (value: string) => value;
assert.nonEmptyArray(strings); assert.nonEmptyArray(strings);